Wrench



H. W. BURLEIGH.

WRENCH.

(Model.)

No. 415,379. Patented Nov. 19, 1889.

351 anew;

wih woo do UNITED STATES PATENT OFFICE.

HARRY IV. BURLEIGII, OF FRANKLIN, NEIV HAMPSHIRE.

WRENCH.

SPECIFICATION forming part of Letters Patent No. 415,379, dated November19, 1889.

' Application filed February 5, 1889. Serial No. 298,696. (Modeh) To allwhom it may concern.-

Be it known that I, HARRY W. BURLEIGH, a citizen of the United States,residing at Franklin, in the county of Merrimac and State of NewHampshire, have invented certain new and useful Improvements in renches,of which the following is a specification.

The object of. this invention is to provide means for the automaticadjustment of a wrench to a nut or other object to be turned by it, alsoto enable the wrench to remain in position after having been onceapplied to a not until removed by an operator.

The invention will be readily understood by reference to the followingspecification and claim, and the accompanying drawings, forming aninseparable part thereof, of which- Figure 1 represents an elevation ofa wrench embodying my improvements, Fig. 2 being a sectional elevationof the same; and Fig. 3 is an elevation showing the reverse side to thatshown in Fig. 1.

The arm Ahas at one end an integral gripping-jaw a, and at the other endmay be attached a handle B. An adjustable grippingjaw c is formed uponan arm (I, which is provided with tongues 0- c entering, respectively,the slots a a formed in the arm A for the purpose of attaching the partsA and C together. To the tongue 0 is attached a plate D, which may beperforated with holes for receiving screws (Z, which are threaded toopenings in the said tongue 0, as indicated in Fig. 2.

The metal between the slots a a of the arm A is grooved upon the sideadjacent to the arm C, in order to make room between said parts for aspring E, which is expanded between the shoulder a of the arm A and oneend of the tongue 0 of the arm O, the said spring spending its forceupon the said tongue. The adjustable jaw c is thereby caused toautomatically close itself upon the stationary jaw a.

In order to hold the jaws the required dis tance apart to receive a nutof given size and to enable them to operate the nut without spreadingfarther apart, one side of the lower part of the slot a may be serrated,as shown at a", and a pawl F may be pivoted at G to that end of the arm0 opposite to the jaw c for engaging the teeth or serrations a, to whichmay be applied a suitable spring II for holding it to its work, saidspring being attached in any convenient manner to the arm O,witl1 itsfree end resting against said pawl to accomplish the desired result, Toopen or separate the jaws, the said pawl must bedisengaged from theteeth or serrations a This may be conveniently accomplished by formingan arm f upon or attaching such arm to the pawl F, said arm beingpreferably provided wit-h a finger-piece f, projecting in a directionpar allel, or nearly so, with the handle 1%. By this construction anoperator, when about to use the wrench, may place a finger or thumb ofthat hand with which hegrasps the handle B upon the finger-piece f ofthe pawl and 'press it gently toward said handle 15, which motion firstreleases said pawl from the teeth a, and when this is accomplished thearm 0 is drawn toward said handle,which opens or increases the spacebetween the jaws a c. This don e, the wrench may be applied to a nut orother article to be turned, and by removing the finger or thumb from thepiece f the action of the spring E auto matically adjusts the jawsthereon, and the pawl F, in connection with the teeth a, sets and holdsthem to their work.

Having described my improvements, what Iclaim as new, and desire tosecure by Letters Patent, is

A wrench comprising a stationary member having at one end a gripping-jawand slots, as shown, and serrations or ratchet-teeth formed upon oneside of one of said slots, a movable member having at one end agripping-jaw and at the other end a pawl for engaging saidratchet-teeth, and a suitable spring adapted to compress said jaws, allcombined substantially for the purpose set fort-h.

In testimony whereof I aifix my signature in presence of two witnesses.

HARRY WV. KURLEIGII. \Vitnesses:

FRANK PRooToR, JOHN P. PROCTOR.

